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I am not a tech (but I appreciate mine). My cat let loose on my hardwood floor and I successfully removed the odor with a product called "Urine-Off" (no, it's not a joke). You can read about it at http://www.urineoff.com/. I don't think they sell from the web, but there's a dealer locator on the site. They make separate products for cat, dog and horse urine, so make sure you get the right one. It takes more than one application (the site has instructions), and you may need to re-finish the surface afterward. Once the urine odor is removed there's a very slight perfume odor until it's completely dry. But it won't stink at all when you're done. (My schnozz is particularly sensitive.) BTW I have no ties to this company. Good luck!

Vinegar is an excellent around the house cleaner for urine cleanup. It removes the smell completely. I used it a lot when I had a puppy, and it really helped. It is important that you remove the smell, because if some is still there the cat might pee there again. Be careful where you put it. (I wouldn't go and pour a gallon of vinegar into the action or anything) It will work though.

I once worked on rebuilding a Steinway grand that the owner let her cats use as a litter box. Strange but TRUE! Some of the wood was saturated. Ack! Needless to say it was purchased at a bargain price. The only thing that really eliminated the smell was sealing the wooden parts with shellac. Other than that, I have had good results with extra strength Febreeze.

I'm just a pet-owning (and piano-owning) consumer, and I like Nature's Miracle. It's enzyme-based with no noxious scent of its own, and is a very popular product (available at Petco or most any comparable retailer of pet supplies).

I've used Nature's Miracle on wood surfaces and keep some in a small spray-top bottle when misting an object seems more appropriate than saturation or soaking. It has the consistency of water and leaves no residue, but I would still be cautious about using any liquid product in or on a piano.

FWIW, I'm always amazed how fantasies of cruelty toward cats are good for a laugh though one would be pilloried for saying something comparable about dogs.

Steven

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"There are two means of refuge from the miseries of life: music and cats."—Albert Schweitzer